From 46a79b4f7a2d701dd110dca275c5a374d73b7308 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Thu, 7 Oct 2021 09:32:06 +0200
Subject: [PATCH] Merge pull request #4609 from mplough-kobold/master

ERS: Fix off-by-one error when reading ERS header
---
 gdal/frmts/ers/ershdrnode.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdal/frmts/ers/ershdrnode.cpp b/gdal/frmts/ers/ershdrnode.cpp
index 58176f0d5a6e..dc7bcffb2174 100644
--- a/gdal/frmts/ers/ershdrnode.cpp
+++ b/gdal/frmts/ers/ershdrnode.cpp
@@ -175,7 +175,7 @@ int ERSHdrNode::ParseChildren( VSILFILE * fp, int nRecLevel )
 
         if( (iOff = osLine.find_first_of( '=' )) != std::string::npos )
         {
-            CPLString osName = iOff == 0 ? std::string() : osLine.substr(0,iOff-1);
+            CPLString osName = iOff == 0 ? std::string() : osLine.substr(0,iOff);
             osName.Trim();
 
             CPLString osValue = osLine.c_str() + iOff + 1;